Acquisition of Two-Dimensional Flowlite Laser Doppler Anemometer

二维 Flowlite 激光多普勒风速计的采集

• 批准号: 0617981
• 负责人: Joseph Cataldo
• 金额: $ 11.5万
• 依托单位: Cooper Union
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0617981&HistoricalAwards=false
• 关键词: Acquisition; Two; Dimensional; Flowlite; Laser

Abstract:This award to The Cooper Union for the Advancement of Science and Art is for the purchase of a Two-Dimensional Flowlite Laser Doppler Anemometer (LDA) for the Fluids Laboratory of the Albert Nerken School of Engineering. The Principal Investigator Joseph Cataldo, Professor of Civil Engineering, will use the equipment in connection with experiments in thermal plume, jet dynamics, and flutter, areas of research that are presently being conducted or are planned in connection with this research program.The versatility of the LDA will provide faculty and students with the opportunity to build on the engineering school's research in hydrodynamics, which it has been conducting for over three decades. The school's Fluids Laboratory has been the setting for experiments on such topics as: 1) static and dynamic effects of power plant thermal plumes; 2) thermal fronts; 3) patternization and quantification of the lake water entrainment into a discharge plume; 4) stratified flow in combined sewage overflow; 5) monitoring petroleum contamination in an aquifer; 6) interaction of surface waves and a jet; 7) flow visualization and radial velocity measurements of entrainment in an axisymmetric turbulent jet; 8) the study of Reynolds number on a jet; 9) chaos; 10) low Reynolds number in a jet; and, 11) hydrodynamic flutter.The laser will be used to open up new areas of research into complex two- and three-dimensional behavior through and around oscillating plates in the flutter experiment. The Reynolds stress in the jet experiments can be determined for low Reynolds numbers, surface wave interaction with the jet and entrainment flows. Also the movement of the thermal fronts can be determined with the proposed Flowlite system. The hot wire probe is presently being used. The size, weight and one dimensional flow limitation of the present LDA makes it impossible to obtain comprehensive two- and three- dimensional flow measurements. The proposed Flowlite LDA can measure X, Y, Z positions of the velocity flows and trace the movement of the fronts.One of the impediments of the current system is that it is used almost continuously during school hours by our graduate students, making it nearly impossible to schedule its use for demonstrations of fluid phenomenon to our undergraduate students. The acquisition of the proposed Flowlite LDA system means that our undergraduate students will also have an LDA for their term laboratory projects. Moreover, acquisition of the instrument enables us to have available a laser for demonstration and experiments in required undergraduate courses. Most important, the new LDA will enhance ongoing collaborations between civil and mechanical engineering (e.g., the aforementioned flutter experiment was conducted in the wind tunnel in the Mechanical Engineering Laboratory adjacent to the Fluids Laboratory), making it possible for our mechanical engineering students to conduct joint projects with our civil engineering students. The improved mobility and lightweight of the Flowlite LDA make it virtually a portable system; and it is virtually maintenance free.

翻译后摘要：这个奖项的库珀联盟的科学与艺术的进步是购买的二维Flowlite激光多普勒风速计（LDA）的流体实验室的阿尔伯特Nerken工程学院。 首席研究员Joseph Cataldo，土木工程教授，将使用该设备进行热羽流，射流动力学和颤振实验，这些研究领域目前正在进行或计划与本研究计划有关。LDA的多功能性将为教师和学生提供建立在工程学院流体动力学研究基础上的机会，已经进行了三十多年。 该学院的流体实验室一直是以下主题的实验设置：1）发电厂热羽流的静态和动态效应; 2）热锋; 3）湖水夹带到排放羽流中的模式化和量化; 4）混合污水溢流中的分层流; 5）监测含水层中的石油污染; 6）表面波和射流的相互作用; 7）轴对称湍流射流中卷吸的流动显示和径向速度测量; 8）射流雷诺数的研究; 9）混沌; 10）射流中的低雷诺数; 11）流体动力学颤振。激光将用于在颤振实验中开辟通过和围绕振动板的复杂二维和三维行为的新研究领域。 射流实验中的雷诺应力可以在低雷诺数、表面波与射流的相互作用和卷吸流的情况下确定。 此外，热锋的移动可以用所提出的Flowlite系统来确定。 目前正在使用热线探头。 目前LDA的尺寸、重量和一维流动限制使得不可能获得全面的二维和三维流动测量。 建议Flowlite LDA可以测量速度流的X，Y，Z位置和跟踪的fronts. The目前的系统的障碍之一是，它几乎是连续使用在学校的时间由我们的研究生，使得它几乎不可能安排使用的流体现象演示给我们的本科生。 拟议的Flowlite LDA系统的收购意味着我们的本科生也将有他们的学期实验室项目的LDA。 此外，该仪器的获得使我们能够在所需的本科课程中获得用于演示和实验的激光器。 最重要的是，新的LDA将加强土木工程和机械工程之间的持续合作（例如，上述颤振实验是在流体实验室附近的机械工程实验室的风洞中进行的，这使得我们的机械工程学生能够与我们的土木工程学生进行联合项目。 Flowlite LDA的改进的移动性和轻量化使其几乎成为一个便携式系统;并且几乎无需维护。